Phase 6: QA fixes for Lighthouse and navigation

- Map is a titled iframe (accessibility); drop @next/third-parties
- "Services" nav toggle is a real button with aria-expanded (SEO
  crawlable-anchors, accessibility)
- Hero images use default quality; page-header image is preloaded (LCP)
- Mobile services submenu no longer clips its last item

Mobile Lighthouse: / 94/100/100/100, /services/computer-repair
96/100/100/100, /areas/henderson 97/100/100/100, /contact 95/100/100/100
(performance/accessibility/best practices/SEO).

Co-Authored-By: Claude Opus 5.5 <[email protected]>

package-lock.json

@@ -9,7 +9,6 @@
       "version": "0.1.0",
       "dependencies": {
         "@next/env": "^16.2.10",
-        "@next/third-parties": "^16.2.10",
         "@radix-ui/react-accordion": "^1.2.3",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
@@ -1304,19 +1303,6 @@
         "node": ">= 10"
       }
     },
-    "node_modules/@next/third-parties": {
-      "version": "16.2.10",
-      "resolved": "https://registry.npmjs.org/@next/third-parties/-/third-parties-16.2.10.tgz",
-      "integrity": "sha512-H3yxCMLziM1JKXnjQv83WBH2cp1fB1vMxpC1/bBTpvvaesBEuRuprpzq5RI32atis0VhUZflgdpJdGNZIGpQaQ==",
-      "license": "MIT",
-      "dependencies": {
-        "third-party-capital": "1.0.20"
-      },
-      "peerDependencies": {
-        "next": "^13.0.0 || ^14.0.0 || ^15.0.0 || ^16.0.0-beta.0",
-        "react": "^18.2.0 || 19.0.0-rc-de68d2f4-20241204 || ^19.0.0"
-      }
-    },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -7298,12 +7284,6 @@
         "node": ">=18"
       }
     },
-    "node_modules/third-party-capital": {
-      "version": "1.0.20",
-      "resolved": "https://registry.npmjs.org/third-party-capital/-/third-party-capital-1.0.20.tgz",
-      "integrity": "sha512-oB7yIimd8SuGptespDAZnNkzIz+NWaJCu2RMsbs4Wmp9zSDUM8Nhi3s2OOcqYuv3mN4hitXc8DVx+LyUmbUDiA==",
-      "license": "ISC"
-    },
     "node_modules/tinyglobby": {
       "version": "0.2.17",
       "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.17.tgz",